UNI 321 Maintenance Free Single Gas Detectors

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Product Information

Specifications

• Product Name: UNI 321 Maintenance-Free Single Gas
  Detectors

• User’s Guide Version: 1.61 (May 2024)

• Gas Name: CO and H2S

• Operating Time Units: Months, Days, Hours

• Features: LED Alarm, Alligator Clip, Remaining Operating Time
  Display, Sensor, Buzzer

Product Usage Instructions

Read Before Operating

This manual must be carefully read by all individuals who have
or will have the responsibility of using, maintaining, or servicing
this product. The product will perform as designed only if it is
used, maintained, and serviced in accordance with the
manufacturer’s instructions.

General Information

User Interface: The device features LED alarms,
alligator clip, remaining operating time display, and various keys
for interaction.

Normal Operation: Full bump test or calibration
and setting other functions can only be performed using a UNI
Docking Box MP100T or the CaliCase MP300T1 by a qualified service
technician.

Normal Mode Operation

Turning the Unit On: Press and hold the Right
Key for 3 seconds until the LCD displays beeps and the green LED
flashes. Once turned on, the battery life countdown timer
begins.

Warm-up Sequence: After powering on, the unit
enters a warm-up and self-test sequence displaying firmware
version, high alarm, and low alarm limits.

Remaining Time Display: After the start-up
sequence, the unit enters normal mode and displays the remaining
operating time in months.

FAQ

Proper Product Disposal at End of Life

The product should be disposed of following local regulations
for electronic waste disposal.

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UNI 321
Maintenance-Free Single Gas Detectors
User’s Guide
Ver 1.61 May 2024

UNI 321 User’s Guide
Contents
Read Before Operating ………………………………………………………………………………………………..2 General Information…………………………………………………………………………………………………….3
User Interface………………………………………………………………………………………………………3 Display ……………………………………………………………………………………………………………….3 Normal Operation ………………………………………………………………………………………………..3 Normal Mode Operation ………………………………………………………………………………………………4 Turning the Unit On ……………………………………………………………………………………………..4 Warm-up Sequence ………………………………………………………………………………………………4 Remaining Time Display ………………………………………………………………………………………4 Alarms ……………………………………………………………………………………………………………….. 4 Hibernation Mode for RT Models………………………………………………………………………………….5 Configuration Mode…………………………………………………………………………………………………….6 Entering and Exiting Configuration Mode ………………………………………………………………6 Zero (fresh air) Calibration ……………………………………………………………………………………6 Set High and Low Alarm Levels…………………………………………………………………………….6 mPower Suite Software…………………………………………………………………………………………7 Maintenance ………………………………………………………………………………………………………………. 8 Replacing the Sensor Filter……………………………………………………………………………………8 Specifications …………………………………………………………………………………………………………….. 9 Sensor Configurations…………………………………………………………………………………………..9 Alarm Signal Summary……………………………………………………………………………………….10 Troubleshooting ……………………………………………………………………………………………………….. 11
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UNI 321 User’s Guide
Read Before Operating
This manual must be carefully read by all individuals who have or will have the responsibility of using, maintaining or servicing this product. The product will perform as designed only if it is used, maintained and serviced in accordance with the manufacturer’s instructions.
WARNING · Never operate the monitor when the cover is removed. · Remove the monitor cover and battery only in an area known to be non-hazardous. · Use only mPower’s lithium battery part number M500-0001-000 [1.17.02.0002] (3.6V,
2700mAH, AA size) or part No. ER14505 cell manufactured by EVE Energy Co., LTD. · This instrument has not been tested in an explosive gas/air atmosphere having an oxygen
concentration greater than 21%. · Substitution of components will impair suitability for intrinsic safety. · Substitution of components will void warranty. · It is recommended to bump test with a known concentration gas to confirm the
instrument is functioning properly before use. · Before use, ensure that the colorless ESD layer on the display is not damaged or peeling.
(The loose blue or colorless protective film used for shipment may be removed.) AVERTISSEMENT
· N’utilisez jamais le moniteur lorsque le couvercle est enlevé. · Retirer le couvercle du moniteur et la batterie uniquement dans une zone connue comme
non dangereuse. · Utilisez uniquement la batterie au lithium de mPower, pièce No. M500-0001-000
[1.17.02.0002] (3.6V, 2700mAH, taille AA) ou celle de EVE Énergie Cie., Lté, pièce No. ER14505. · Cet instrument n’a pas été testé dans une atmosphère explosive gaz / air ayant une concentration en oxygène supérieure à 21%. · La substitution de composants compromettra l’aptitude à la sécurité intrinsèque. · La substitution des composants annulera la garantie. · Il est recommandé de tester avec un gaz de concentration connu pour confirmer que l’ins trument fonctionne correctement avant de l’utiliser. · Avant l’utilisation, assurez- vous que la couche ESD incolore de l’écran n’est pas endommagée ou épluchée. (Le film protecteur bleu peut être enlevé.)
Proper Product Disposal at End of Life
The Waste Electrical and Electronic Equipment (WEEE) irective (2002/96/EC) is intended to promote recycling of electrical and electronic equipment and their components at end of life. This symbol (crossed-out wheeled bin) indicates separate collection of waste electrical and electronic equipment in the EU countries. This product may contain one or more nickel-metal hydride (NiMH), lithium-ion, or alkaline batteries. Specific battery information is given in this user guide. Batteries must be recycled or disposed of properly. At the end of its life, this product must undergo separate collection and recycling from general or household waste. Please use the return and collection system available in your country for the disposal of this product.
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UNI 321 User’s Guide
General Information
The UNI 321 is a disposable or maintenance-free version of the UNI single gas detector. It detects H2S or CO in a selection of models for an operation life of either 24 months (MP102) or 36 months (MP103). The detector has a large LCD providing maximum readability in the field. The display shows the reamining operating time (for concentration readout use UNI MP100). Six bright red LEDs allow for quick alarm notification. Constructed of strong and durable material, the UNI 321 is designed to be comfortable, yet drop-resistant.

User Interface

LED Alarm

Alligator Clip

Remaining Operating Time
Display

LED Alarm

Confirm Action/ Number Increase
Key

Power On-Off/ Move Cursor Key

Sensor

Buzzer

Display
1. Gas name, includes: CO and H2S 2. Remaining time unit: Months, Days, Hours 3. Question mark: Daily alarm test needed; Bump test
due; Perform menu function 4. OK: Accept menu entry; Unit status indicator 5. Gas concentration unit (for alarm setting display) 6. Remaining operating time (Months/Days/Hours) 7. Low battery warning
Normal Operation
Normal operation is limited to the following functions · Displaying the remaining operating time (the unit cannot be turned off) · Displaying (and logging) the Alarm Level if this concentration of gas is exceeded · Entering Configuration Mode to perform a fresh air zero calibration · Replacing the sensor filter if used in especially highly dusty or moist environments
Full bump test or calibration, and setting other functions can only be performed using a UNI Docking Box MP100T or the CaliCase MP300T1 by a qualified service technician.
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UNI 321 User’s Guide

Normal Mode Operation

Turning the Unit On

NOTE: ONCE THE UNIT IS TURNED ON IT CANNOT BE TURNED OFF AND THE BATTERY LIFE COUNTDOWN TIMER BEGINS.

Press and hold the Right Key for 3 seconds, until the LCD displays beeps, and the green LED flashes.

, the buzzer

Warm-up Sequence
After powering on, the unit enters a warm up and self-test sequence, showing the firmware

version

followed by the the High Alarm

and Low Alarm

limits. If a sensor is not installed or cannot be identified by the instrument, the screen

flashes between

and

.

Remaining Time Display
After the start-up sequence, the unit enters normal mode and displays the remaining operating

time in months

. When <3 months remain, the display switches to remaining days, and

when <1 day remains it switches to remaining hours. Once the unit is running, it cannot be turned off manually and it stays on until the battery loses power or the unit life expires.

Alarms
Daily Alarm Test (Flashing “?”) Before each day’s use, the ? question mark will be flashing to remind the user to press the Left [OK] Key once to test the function of the audio, visual and vibration alarms.
WARNING: IF ANY OF THE NEEDED ALARMS ARE NOT FUNCTIONING, DO NOT USE THE INSTRUMENT AND RETURN IT FOR SERVICE.
Normal Alarm Function If the gas concentration exceeds an alarm limit, the display shows the alarm value being

exceeded

and gives audio, visual and vibration alarms according to the table at the

end of this manual (see Alarm Signal Summary). Once the concentration is no longer in an alarm condition, the unit reverts back to the time display, but logs the alarm event in memory. The alarm condition must persist for more than a few seconds for it to be registered; shorter alarms may not be logged.

Calibration Fail Alarm (For Service Use Only) If the instrument fails calibration, it will alternately display

and the remaining run

time

, once per second. The user can perform a manual Zero Calibration (see below)

on the instrument alone, but a full span calibration requires a Docking Box or CaliCase.

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UNI 321 User’s Guide

Bump Fail Alarm (For Service Use Only) If the instrument fails a Bump test using the Docking Box or CaliCase, it will alternately

display

and the remaining run time

once per second.

Bump Due Alarm (For Service Use Only) If the Bump Due setting is enabled and the due date has passed, the question mark will flash

twice per second while the display continues to show the remaining run time

.

Hibernation Mode for RT Models
Once the unit is turned on, it runs continuously until the remaining lifetime ends. To save battery power when the unit is not used, it can be put into Hibernation Mode by placing it into the cradle of the UNI docking box and pressing the Bump key for 5 seconds. To exit from Hibernation Mode, press and hold the Right Key on the unit for 3 seconds to wake it up again. Hibernation Mode is for UNI 321 RT models MP101 and MP102 only.

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UNI 321 User’s Guide

Configuration Mode
In the configuration mode the user can do a zero (fresh air) calibration and set the high and low alarm thresholds. In general, use the Left Key to increase the number or confirm, use the Right Key to move the cursor or move to the next programming item. Detailed configuration settings can be performed using the mPower Suite software through the UNI Docking Box MP100T or CaliCase MP300T1 (see UNI manual or CaliCase manual).

Entering and Exiting Configuration Mode
Press and hold the Left Key and the Right Key simultaneously for 3 seconds. The unit

prompts for a password by displaying

and

, with the first digit flashing. The

UNI 321 preset password is 0000. Use the Left [OK] Key to increase the number, and the Right [ ] Key to move the cursor. Once all four digits are entered, the cursor will move to “OK”, causing it to flash. Press the Left Key to accept and enter the Configuration Mode.

To Exit Configuration Mode, scroll through the menu using the Right [ ] Key until EXIT? is shown, and press Left [OK].

Zero (fresh air) Calibration
Zero (Air) calibration is to set the base line for the sensor. It is done in fresh air or other
source known to be free of detectable gas (For an O2 unit, “zeroing” sets the value to 20.9%,

so air must be used). When the LCD displays

, press the Left Key to begin the air

calibration. The unit will start a 15 second count-down, and then display the calibration result

as either pass

or fail

. The user can abort the zero calibration during the 15

seconds count-down by pressing the Right Key, after which

is displayed.

Set High and Low Alarm Levels

After Air calibration is completed or skipped, the unit displays

to set the High Alarm

limit.

· Press Left to enter the menu. The current setting value is displayed,

with the first digit flashing:

· Use the Left Key to increase the current digit, cycling from 0 to 9:

· Use the Right Key to move the cursor to the next digit:

· After all digits are entered, use the Right Key to move to the “OK” symbol, and press the Left Key to save the entry. The unit will display
SAVE for a few seconds while storing the value but it is not necessary to press OK to initiate saving.

· The display automatically moves to set the Low Alarm limit

Adjust the Low Alarm in the same way as for the High Alarm.

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UNI 321 User’s Guide

4-bay CaliCase

UNI Docking Box

mPower Suite Software
mPower Suite is the PC software used to read logged alarm events and set up extra configuration parameters of the UNI 321. To communicate with the UNI 321, an IR reader, UNI Single Docking Box MP100T or CaliCase System MP300T1 are required. For operation details see the UNI MP100 Manual.

Configuration Set-up Using mPower Suite 7

UNI 321 User’s Guide
Maintenance
NOTE: The UNI 321 is designed as a disposable instrument and does not need maintenance under normal circumstances. However, in highly dusty or wet environments, it may be necessary to replace the sensor filter as described below.
Maintenance should be performed only by a qualified person who has proper training and fully understands the contents of the manual.
Replacing the Sensor Filter
The filter may need replacement under special circumstances such as use high- dust or condensing environments. External filter clips are available to reduce the need to replace the internal filter. Sheets of 5 “peel-and-stick” internal filters are available for this purpose: 1) Turn off the UNI 321 and place it face down on a soft surface. 2) Use a T10 Torx screwdriver to loosen (counterclockwise) each of the four screws. 3) Remove the top cover after carefully unplugging the buzzer connector. 4) Peel a filter from the sheet and center it over the sensor. Gently press down. 5) Re-connect in the buzzer connector and re-install the top cover. 6) Re-install the screws in the back cover. Be careful to not overtighten the screws.

External Filter Clip

Sensor

Filter

Battery CAUTION · Change battery only in area known to be non-hazardous. · Use only mPower battery, PN: 1.17.02.0002 or PN ER14505 cell manufactured by EVE Energy Co., LTD. ATTENTION · Changez la batterie uniquement dans une zone connue pour être non dangereuse. · Utilisez uniquement la batterie au lithium de mPower, pièce No. 1.17.02.0002 (3.6V, 2700 mAH, taille AA) ou celle deEVE Énergie Cie., Lté, pièce No. ER14505.
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Specifications

UNI 321 User’s Guide

Sensor Configurations

Sensor

Range (ppm)

Resolution (ppm)

t90(s)

CO 0-500

1

15

H2S 0-100

0.1

15

Span (ppm)
50
25

Low Alarm (ppm) 35
10

High Alarm (ppm) 200
15

CAUTION: Use only mPower sensors.

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UNI 321 User’s Guide

Alarm Signal Summary

LCD Display

Reason/Alarm Signals

Low alarm Buzzer 2 beeps per second LED 2 flashes per second 1 vibration per second
“LOW” 2 flashes per second High alarm Buzzer 3 beeps per second LED 3 flashes per second 1 vibration per second
“HIGH” 2 flashes per second Over-range Buzzer 3 beeps per second LED 3 flashes per second 1 vibration per second “OVER” and “500” 1 flash per second

Daily Alarm Check needed or Bump Due alarm: ? 2 flashes per second
Bump Fail alarm: Buzzer 1 beep per minute LED 1 flash per minute
1 vibration per minute “Bump” and “Remain Time” alternate display per second

Calibration Fail alarm: Buzzer 1 beep per minute LED 1 flash per minute
1 vibration per minute “CAL” and “Remain Time” display alternately once per second

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UNI 321 User’s Guide
Battery Low alarm Battery Empty prompt
Buzzer 1 beep per minute LED 1 flash per minute
1 vibration per minute Battery fail alarm Buzzer 1 beep per second LED 1 flash per second “bAT LoW”1 flash per second
Sensor error Buzzer 1 beep per second LED 1 flash per second “SEN Err”1 flash per second

Troubleshooting

Problem
Cannot turn on unit Weak or No Response

Possible reason
Depleted or defective battery Filter(s) plugged

Buzzer, LED, or vibration Bad buzzer, LEDs, or vibration alarm. alarm inoperative
Blocked alarm port

Solution
Call authorized service center Replace external filter clip or internal filter Call authorized service center
Clean or unblock alarm port

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UNI 321 User’s Guide
mPower Electronics, Inc. 2910 Scott Boulevard, Santa Clara, CA 95054
Phone: (408)320-1266 Fax: (669)342-7077 info@mpowerinc.com www.mpowerinc.com
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